Throttling capillary tube assembly of unit type air conditioner

Abstract

The utility model relates to the technical field of air conditioning equipment, and discloses a unit type air conditioner throttling capillary tube assembly which adopts a unit type structure, is simple in structure and convenient to produce and process, and can provide stable and reliable working support for a refrigeration capillary tube by arranging a strip-shaped wire buckle on the mounting side of the refrigeration capillary tube. A double-section throttling structure is adopted, work control is carried out through a one-way valve, in the refrigerating work process, a refrigerant only passes through a refrigerating capillary tube through the pressure difference and the non-return effect of the one-way valve, the throttling and pressure reducing requirements of a refrigerating system can be met through one-time throttling, and in the heating work process, the refrigerant firstly passes through a heating capillary tube to be subjected to first-time throttling and pressure reducing, and then the refrigerant passes through a second-time throttling and pressure reducing valve to be subjected to second-time throttling and pressure reducing. And the throttling and pressure reducing requirements of a heating system are met through secondary throttling and pressure reducing of the refrigerating capillary tube, the throttling and pressure reducing requirements of an air conditioning system under different working conditions can be met through dual-mode work, and compared with a traditional single-section type throttling capillary tube, the throttling and pressure reducing capillary tube has the better throttling work effect and work stability.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning equipment technology, specifically to a throttling capillary assembly for a unitary air conditioner. Background Technology

[0002] A throttling device is one of the four basic components necessary for realizing a refrigeration cycle. In small air conditioners, refrigerators, and other refrigeration equipment, a capillary tube is typically used as a throttling device. When high-pressure refrigerant flows inside the capillary tube, the refrigerant experiences significant resistance due to the small inner diameter of the capillary tube, resulting in a large pressure drop. By changing the length and inner diameter of the capillary tube, the pressure drop of the refrigerant can be adjusted, thereby controlling the refrigerant flow rate into the evaporator to meet different refrigeration needs.

[0003] Throttling capillary tubes mainly rely on the thin tube structure to throttle and reduce pressure. However, existing throttling capillary tubes are generally complex and difficult to manufacture. Moreover, they often operate in a single throttling mode, resulting in unsatisfactory throttling effects. Therefore, a unit-type throttling capillary tube assembly for air conditioners is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a throttling capillary assembly for a unitary air conditioner to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a unitary air conditioner throttling capillary assembly, including a tube body mechanism and a strip-shaped wire buckle. The tube body mechanism includes a cooling capillary, a capillary connector, a one-way valve, a heating capillary, and a one-way valve connector. The heating capillary and the one-way valve are connected and installed at their respective ends. The cooling capillary and the one-way valve connector are respectively connected and installed at the end of the capillary connector. The capillary connector is installed at the port of the cooling capillary.

[0006] A throttling bend is provided in the middle of the capillary tube connector, and the strip-shaped wire buckle is supported and installed on the upper part of the throttling bend. Thin tube clamping grooves are provided on both sides of the strip-shaped wire buckle, and a support partition is provided in the middle of the strip-shaped wire buckle.

[0007] Preferably, the one-way valve connector is a thick-bent pipe, with one end of the one-way valve connector connected to the C port side of the lower part of the one-way valve, and the D port of the other end of the one-way valve connector connected to the air conditioning system piping.

[0008] Preferably, the aforementioned refrigeration capillary tube is a thin, curved tube. One end of the refrigeration capillary tube is connected to the B port side of the upper part of the one-way valve, and the capillary tube connector is fixedly connected to the other end of the refrigeration capillary tube. The A port of the capillary tube connector is connected to the piping of the air conditioning system.

[0009] Preferably, the heating capillary tube is a thin, curved tube, and its two ends are connected to the B and E ports on the upper and lower sides of the one-way valve, respectively.

[0010] Preferably, the throttling bend is a continuous annular structure, the supporting baffles are equidistantly distributed and installed at the lower part of the strip buckle, the middle part of the supporting baffle is provided with a bend groove separated by the strip buckle, and the middle part of the throttling bend is fitted and installed inside the bend groove.

[0011] Preferably, the aforementioned thin tube clamping grooves are symmetrically arranged on both sides of the lower part of the support partition, and the thin tube clamping grooves are fitted and clamped to the outermost tube body of the throttling bend.

[0012] Preferably, the upper part of the strip-shaped wire buckle is provided with a mounting screw seat in a protruding shape, and a mounting bolt is installed in the screw hole in the middle of the mounting screw seat. The strip-shaped wire buckle is fixedly installed to the bracket inside the outdoor unit by the mounting bolt.

[0013] Compared with the prior art, the present invention, by adopting the above technical solution, has the following technical effects:

[0014] This throttling capillary assembly adopts a modular structure, with each component manufactured and installed separately. The structure is simple and easy to manufacture. A strip-shaped clamp is provided on the installation side of the refrigerant capillary, using an end-side snap-fit ​​connection with a central partition for easy installation and providing stable and reliable support for the refrigerant capillary. It employs a dual-stage throttling structure and is controlled by a one-way valve. During cooling operation, the indoor evaporator temperature is high, requiring a large cooling flow. Utilizing the pressure difference and the check valve's non-return effect, the refrigerant passes only through the refrigerant capillary, satisfying the throttling and pressure reduction requirements of the refrigeration system with a single throttling operation. During heating operation, the outdoor temperature is low, requiring a smaller cooling flow. The refrigerant first undergoes a first throttling and pressure reduction through the heating capillary, and then a second throttling and pressure reduction through the refrigerant capillary to meet the throttling and pressure reduction requirements of the heating system. This dual-mode operation can meet the throttling and pressure reduction requirements of the air conditioning system under different operating conditions, offering better throttling performance and operational stability compared to traditional single-stage throttling capillary assemblies. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall upper three-dimensional structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall lower three-dimensional structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the overall planar structure of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the strip-shaped buckle of this utility model;

[0020] Figure 5 This is a schematic diagram of the working structure of the present invention within an air conditioning system.

[0021] Explanation of reference numerals in the attached diagram: 1. Refrigeration capillary tube; 2. Capillary tube connector; 3. Check valve; 4. Heating capillary tube; 5. Check valve connector; 6. Strip wire clip; 7. Capillary tube clamping groove; 8. Support partition; 9. Mounting screw seat. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0024] Example

[0025] Please see Figures 1-5 This utility model provides a technical solution: a unitary air conditioner throttling capillary assembly, including a tube body mechanism and a strip-shaped wire buckle 6. The tube body mechanism is used for refrigerant throttling. The tube body mechanism includes a refrigerant capillary tube 1, a capillary tube connector 2, a one-way valve 3, a heating capillary tube 4, and a one-way valve connector 5. Specifically:

[0026] The material of the refrigeration capillary tube 1 is TP2M copper tube, with an outer diameter of Φ2.5mm, an inner diameter of 1.5mm, and a length of 600mm;

[0027] The capillary tube connector 2 is made of TP2M copper tubing with an outer diameter of Φ6.35mm and a wall thickness of 0.6mm.

[0028] The material of the one-way valve 3 is TP2M copper pipe, and the inside is equipped with copper pipes with inner diameters of 2.7mm, 6.2mm, 2.7mm and 2.7mm, and the length of the copper pipe is 100mm. The corresponding one-way valve 3 is equipped with port B, port C, port E and port F.

[0029] The heating capillary tube 4 is made of TP2M copper tube with an outer diameter of Φ2.5mm, an inner diameter of 1.5mm, and a length of 520mm.

[0030] The material of the one-way valve connecting pipe 5 is TP2M copper pipe with an outer diameter of 6mm and a wall thickness of 0.6mm;

[0031] The heating capillary tube 4 and the two ends of the one-way valve 3 are connected and installed accordingly, as shown in the attached document. Figure 3 As shown, the heating capillary tube 4 is a thin, curved tube. Both ends of the heating capillary tube 4 are connected to ports B and E on the upper and lower sides of the one-way valve 3, respectively, forming a closed-loop circulation pipeline. The cooling capillary tube 1 and the one-way valve connector 5 are connected to the ends of the capillary tube connector 2. Specifically, the one-way valve connector 5 is a thick, curved tube. One end of the one-way valve connector 5 is connected to port C at the lower part of the one-way valve 3, and port D at the other end of the one-way valve connector 5 is connected to the air conditioning system pipeline. The cooling capillary tube 1 is a thin, curved tube. One end of the cooling capillary tube 1 is connected to port B at the upper part of the one-way valve 3. A two-stage throttling structure is adopted, and the operation is controlled by the one-way valve 3. During cooling operation, the indoor evaporator temperature is high, requiring a large cooling flow rate. The pressure difference and the check valve 3 prevent the refrigerant from flowing out. The refrigeration system's throttling and pressure reduction requirements can be met with a single throttling operation through the refrigeration capillary tube 1. During heating operation, the outdoor temperature is low, and the required refrigeration flow rate is small. The refrigerant first undergoes a first throttling and pressure reduction through the heating capillary tube 4, and then undergoes a second throttling and pressure reduction through the refrigeration capillary tube 1 to meet the throttling and pressure reduction requirements of the heating system. Through dual-mode operation, the throttling and pressure reduction requirements of the air conditioning system under different operating conditions can be met. Compared with the traditional single-stage throttling capillary tube, it has better throttling effect and working stability. The capillary tube connector 2 is fixedly connected and installed at the other end of the refrigeration capillary tube 1. The A port of the capillary tube connector 2 is connected and installed with the air conditioning system's piping. Each component can be manufactured and installed by separate assembly. The structure is simple and the production and processing are convenient. The copper pipes and refrigeration accessories connected above are brazed.

[0032] To improve the cost-saving effect, see attached Figure 1 As shown, a throttling bend is provided in the middle of the refrigeration capillary tube 1. The throttling bend has a continuous annular structure, which can effectively increase the throttling effect of the refrigerant. In order to improve the structural support stability at the throttling bend, a strip-shaped buckle 6 is installed on the upper part of the throttling bend. In order to separate and support the branch pipes of the throttling bend, a support partition 8 is provided in the middle of the strip-shaped buckle 6, as shown in the attached figure.Figure 4 As shown, the support partitions 8 are evenly distributed and installed at the lower part of the strip-shaped wire clips 6. The middle part of the support partitions 8 is divided by the strip-shaped wire clips 6 and has a bend groove. The middle part of the throttling bend is fitted into the inner side of the bend groove. In order to connect with the throttling bend, thin tube clamping grooves 7 are provided on both sides of the strip-shaped wire clips 6. The thin tube clamping grooves 7 are symmetrically arranged on both sides of the lower part of the support partitions 8. The thin tube clamping grooves 7 are fitted into the outermost part of the throttling bend. The strip-shaped wire clips 6 adopt the end-side clamping and middle partition type installation method, which is convenient to install and can provide stable and reliable working support for the refrigerant capillary tube 1. In order to connect with the outdoor unit structure, a mounting screw seat 9 is provided in a protruding shape at the upper part of the strip-shaped wire clips 6. A mounting bolt is installed in the screw hole in the middle of the mounting screw seat 9. The strip-shaped wire clips 6 are fixedly installed to the bracket inside the outdoor unit by the mounting bolt.

[0033] Working principle or structural principle:

[0034] Refrigeration Cycle: In the unit air conditioner operating at the outdoor cooling ambient temperature, the high-temperature, high-pressure refrigerant gas discharged from the compressor outlet of the outdoor unit enters a four-way valve (D1 inlet, C1 outlet) through several copper pipes. At this time, D1 and C1 are open, and E1 and S1 are open, switching the flow path to the condenser for condensation and heat release. The fan forces convection heat exchange between the condenser and the outdoor air. The condensed liquid refrigerant enters the capillary tube assembly through port A for throttling and pressure reduction, then flows out of the capillary tube assembly through port D. Specifically, in this process, the refrigerant from port A passes through capillary tube connector 2 and then through the refrigeration capillary tube 1 for throttling and pressure reduction. The throttled and pressure-reduced refrigerant then enters one-way valve 3 through port B and flows out through one-way valve 3 through port C. The refrigerant flows out from the capillary tube assembly through port D. During the process, almost no refrigerant passes through ports E and F due to the pressure difference of the refrigeration system and the flow direction restriction of the one-way valve, realizing single-stage throttling of the refrigerant. After being throttled by the capillary assembly, the refrigerant enters the indoor unit evaporator through the liquid pipe shut-off valve to evaporate and absorb heat. The fan forces the evaporator and the indoor air to convect and exchange heat, realizing indoor unit refrigeration. The refrigerant flowing out of the indoor unit enters the four-way valve E1 inlet and S1 outlet after passing through the gas pipe shut-off valve. At this time (D1 and C1 are connected, E1 and S1 are connected), the flow path is switched to enter the gas-liquid separator for refrigerant gas-liquid separation. The separated low-temperature, low-pressure refrigerant gas enters the compressor inlet and is compressed by the compressor, realizing a refrigeration cycle.

[0035] Heating Cycle: In the unit air conditioner, under the outdoor cooling ambient temperature, the high-temperature, high-pressure refrigerant gas discharged from the compressor outlet of the outdoor unit enters the four-way valve D1 (inlet) and E1 (outlet) through several copper pipes. At this time (D1 and E1 are open, C1 and S1 are open), the flow path is switched, and the refrigerant enters the evaporator through the gas pipe shut-off valve to condense and release heat. The fan forces the evaporator and indoor air to convect and exchange heat, i.e., heating. The condensed liquid refrigerant enters the capillary tube assembly through the liquid pipe shut-off valve at port D for throttling and pressure reduction. Specifically, in this process, the refrigerant enters the one-way valve assembly from port D through one-way valve pipe 5, then through port C, and then through port E to enter the heating capillary tube 4 for the first throttling and pressure reduction. After the first throttling and pressure reduction, the refrigerant enters one-way valve 3 through port F. The refrigerant enters the refrigerant capillary tube 1 through port B for a second throttling and pressure reduction. After throttling and pressure reduction, the refrigerant flows out through the capillary tube connector 2 and then through port A (ports E and C are interconnected, ports B and F are interconnected, ports B and C and B and E are unidirectionally connected, and ports F and C and F and E are unidirectionally connected), achieving dual-stage throttling of the refrigerant. After being throttled by the capillary tube assembly, the refrigerant enters the indoor unit condenser for evaporation and heat absorption. The fan forces the condenser and the outdoor air to convect and exchange heat, achieving indoor unit cooling. The refrigerant flowing out of the outdoor unit enters the four-way valve C1 inlet and S1 outlet. At this time, D1 and E1 are connected, and C1 and S1 are connected, switching the flow path to enter the gas-liquid separator for refrigerant gas-liquid separation. The separated low-temperature, low-pressure refrigerant gas enters the compressor inlet and is compressed by the compressor, realizing a heating cycle.

[0036] In summary, this throttling capillary assembly adopts a modular structure, allowing for the separate assembly and manufacturing of each component. This design is simple and easy to produce. A strip-shaped clamp 6 is installed on the mounting side of the refrigeration capillary 1. The clamp 6 uses an end-side snap-fit ​​connection with a central partition type installation method, facilitating installation and providing stable and reliable support for the refrigeration capillary 1. Furthermore, it employs a two-stage throttling structure and controls operation via a one-way valve 3. During refrigeration operation, the indoor evaporator temperature is high, requiring a large refrigeration flow rate. This is achieved by utilizing the pressure difference and the one-way valve 3. The check valve 3 allows the refrigerant to pass only through the refrigerant capillary tube 1, and the throttling and pressure reduction requirements of the refrigeration system can be met with a single throttling. When the outdoor temperature is low during heating, the required cooling flow rate is small. The refrigerant first undergoes a first throttling and pressure reduction through the heating capillary tube 4, and then undergoes a second throttling and pressure reduction through the refrigerant capillary tube 1 to meet the throttling and pressure reduction requirements of the heating system. Through dual-mode operation, the throttling and pressure reduction requirements of the air conditioning system under different operating conditions can be met. Compared with the traditional single-stage throttling capillary tube, it has better throttling effect and working stability.

[0037] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this utility model can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in this utility model. In particular, the features described in the various embodiments and / or claims of this utility model can be combined or combined in various ways without departing from the spirit and teachings of this utility model. All such combinations and / or combinations fall within the scope of this utility model.

Claims

1. A unitary air conditioner throttling capillary assembly, comprising a tube body mechanism and a strip-shaped wire buckle (6), characterized in that: The tube body structure includes a refrigeration capillary tube (1), a capillary tube connector (2), a one-way valve (3), a heating capillary tube (4), and a one-way valve connector (5). The heating capillary tube (4) and the one-way valve (3) are connected and installed at their respective ends. The refrigeration capillary tube (1) and the one-way valve connector (5) are connected and installed at the end of the capillary tube connector (2). The capillary tube connector (2) is installed at the port of the refrigeration capillary tube (1). The capillary tube connector (2) is provided with a throttling bend in the middle, and the strip wire buckle (6) is supported and installed on the upper part of the throttling bend. Both sides of the strip wire buckle (6) are provided with a thin tube clamping groove (7), and the middle of the strip wire buckle (6) is provided with a supporting partition (8).

2. The unitary air conditioner throttling capillary assembly according to claim 1, characterized in that: The one-way valve connector (5) is a thick bend pipe. One end of the one-way valve connector (5) is connected to the C port side of the lower part of the one-way valve (3), and the D port of the other end of the one-way valve connector (5) is connected to the pipeline of the air conditioning system.

3. The unitary air conditioner throttling capillary assembly according to claim 2, characterized in that: The refrigeration capillary tube (1) is a thin curved tube. One end of the refrigeration capillary tube (1) is connected to the B port side of the one-way valve (3). The capillary tube connector (2) is fixedly connected to the other end of the refrigeration capillary tube (1). The A port of the capillary tube connector (2) is connected to the air conditioning system pipeline.

4. The unitary air conditioner throttling capillary assembly according to claim 3, characterized in that: The heating capillary tube (4) is a thin curved tube, and its two ends are connected to the B port and E port on the upper and lower sides of the one-way valve (3), respectively.

5. The unitary air conditioner throttling capillary assembly according to claim 1, characterized in that: The throttling bend is a continuous ring structure. The supporting partition (8) is equidistantly distributed and installed on the lower part of the strip buckle (6). The middle part of the supporting partition (8) is provided with a bend groove separated by the strip buckle (6). The middle part of the throttling bend is fitted and installed on the inner side of the bend groove.

6. The unitary air conditioner throttling capillary assembly according to claim 5, characterized in that: The thin tube clamping groove (7) is symmetrically arranged on both sides of the lower part of the support partition (8), and the thin tube clamping groove (7) is fitted and clamped to the outermost tube body of the throttling bend.

7. The unitary air conditioner throttling capillary assembly according to claim 6, characterized in that: The upper part of the strip-shaped wire buckle (6) is provided with a mounting screw seat (9) protruding outwards. A mounting bolt is installed in the screw hole in the middle of the mounting screw seat (9). The strip-shaped wire buckle (6) is fixedly installed to the bracket inside the outdoor unit by the mounting bolt.

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